Hex Head Cap Screws Grade 8 Steel Plain (USA Made) 9/16-18 x 5 are high-strength fasteners designed for demanding assemblies. Crafted from Grade 8 steel and manufactured in the USA, these plain (uncoated) screws deliver reliable performance in machine shops, automotive, and industrial environments.

Overview

These hex head cap screws feature a durable Grade 8 steel body with a plain finish, making them ideal for indoor use where corrosion resistance is not a primary concern. The 9/16-18 size corresponds to a 9/16 inch diameter with 18 threads per inch, and they measure 5 inches in length, providing strong clamping power in a compact package.

Key Features

• Grade 8 steel for exceptional strength and toughness
• Plain, uncoated finish for clean assemblies and cost-efficiency
• Hex head for secure torque transfer and easy insertion
• Size: 9/16-18 UNC (9/16 in diameter, 18 TPI, 5 in length)
• Made in the USA

Specifications

• Material: Grade 8 steel
• Finish: Plain (uncoated)
• Head type: Hex
• Thread size: 9/16-18 UNC
• Length: 5 inches
• Country of origin: USA

Ideal for machinery, automotive builds, equipment maintenance, and other high-stress assemblies where maximum strength and reliability are essential. If you need a plain finish without coatings and prefer American-made hardware, these screws are a dependable choice.